That looks like a nice cat, but suuuuper rare. And there is no marked for rare fish here. I need to look in other the neighbour country anyway. and even there, super rare to find such fish. Catfish are not very popular here. unfortunately for me ;-)
Yes i think the whole Chrysichthys family is quite rare in the hobby. Im lucked out since im picking a Chrysichthys furcatus up prob next weekend.
But another cat that looks similar you got arius seemanni. They dont grow that big either and are quite common in the hobby. But i think they needs brackish water when older.